834 Risultati per: "SIGMA ALDRICH MICROSCOPY"

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Cibacron Brilliant Yellow 3G-P, (Reactive yellow 2)

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Useful standard for elemental analysis.

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Propionaldehyde 2,4-dinitrophenylhydrazone analytical standard, for environmental analysis, Sigma-Aldrich®

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N,N-Dimethyl-1-naphthylamine is an aromatic amine and a dye.

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Tetrazolium blue chloride (BTC) is a colorless tetrazolium compound that upon reduction forms a colored diformazan. The reactivity has been applied to the analysis of reducing compounds including the nanomolar detection of reducing sugars and carbidopa and methyldopa. BTC has been used for histological staining of mouse coronal brain sections and rat brain sections. In combination with 4-nitrocatechol, tetrazolium blue chloride forms a ternary complex with molybdenum(VI) for extraction and spectrophotometric determination of molybdenum. It has also been used to stain Francisella tularensis cells for tularemic microagglutination test.

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2,3,5-Trifeniltetrazolio cloruro ≥98% (by HPLC), Sigma-Aldrich®

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1-(Methylamino)anthraquinone 98%, Sigma-Aldrich®

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Murexide is the ammonium salt of purpuric acid that appears as a slightly reddish-purple powder and is soluble in water. It is mainly used as an indicator for complexometric titrations to measure water hardness and as a colorant/pigment in the dye industry.

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5,10,15,20-Tetraphenyl-21H, 23H-porphine-p,p′,p,p′′′-tetrasulfonic acid tetrasodium hydrate is a water-soluble porphyrin. It is a negatively charged compound due to the presence of the sulfonate groups. It has been used to functionalize chemically converted graphene to form conductive graphene films of varying thickness.

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Amaranth has been used as a dye for the microscopic visualization of crop contraction in blowflies. It has been used in the electrophoresis gel to track the migration front of the electrode buffer.

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Thionin(acetate), Sigma-Aldrich®

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When immobilised using an insoluble porous support matrix such as agarose, Cibacron Blue 3GA is used for affinity chromatography purification of enzymes. This affinity has been attributed to a structural similarity between the dye and the natural ligands for proteins with cofactor binding domains.

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3-Ethoxy-4-methoxybenzaldehyde is a derivative of vanillin. 3-Ethoxy-4-methoxybenzaldehyde may be used to synthesise Compound of Designation red 10 binding (CDr10b) to investigate its role in neuroinflammatory diseases.

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Olio rosso O, Sigma-Aldrich®

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Acid blue 20, Practical grade, Sigma-Aldrich®

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Calcein blue fluorescent dye, Sigma-Aldrich®

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Reagent used for the generation of chemiluminescence in the presence of a reductant and oxygen; it is employed in numerous chemiluminescent assays. Lucigenin is specific for superoxide anion radical.

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4,4′-Methylenebis(N,N-dimethylaniline) is an intermediate in dye manufacture and works as a reagent for the determination of lead. It is suitable for the qualitative assay of cyanogens.

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3,3′-dihexyloxacarbocyanine iodide (DiOC6) is a supravital lipophilic fluorochrome. This cationic dye is employed to stain mitochondria and endoplasmic reticulum in animal and plant cells. In addition, it acts as a very rapid, consistent and highly selective fluorochrome for endophytic ascomycetes in plant roots and liverworts. DiOC6 also facilitates the detection of different mitochondrial changes happening during early apoptosis.

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Coproporphyrin I tetramethyl ester. ≥90% (HPLC) (Tetramethyl 3,8,13,18-tetramethyl-21H,23H-porphine-2,7,12,17-tetrapropionate)

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Acid Fuchsin calcium salt,certified by the Biological Stain Commission, Dye content ≥60 % (Acid Magenta; Acid Rubin; Fuchsin S, SS, SS, ST, or SIII; Rubin S)

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Thymol iodide, (4,4'-Bis(iodooxy)-2,2'-dimethyl-5,5'-bis(1-methylethyl)-1,1'-biphenyl)

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5-([4,6-Dichlorotriazin-2-yl]amino)fluorescein hydrochloride has been used for labeling of yeast cells to study the adhesion of yeast cells to the digestive tract of sea bass (Dicentrarchus labrax) larvae and leopard grouper (Mycteroperca rosacea).

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4-Amino-1,1′-azobenzene-3,4′-disulfonic acid monosodium salt, also called as acid yellow 9, belongs to the class of azo dyes.

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Histology slides with paraffin embedded section of human intestine containing argentaffin granules. Suitable for use with Fontana-Masson stain kit (Procedure No. HT200).

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o-Cresolphthalein, Sigma-Aldrich®

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Formalin solution, neutral buffered, 10% is the most commonly used fixative for light microscopy. It requires a relatively short period of fixation. It is suitable for the long-term storage of tissue. Once properly fixed, the tissue should be able to withstand the subsequent stages of tissue processing or staining. 10% NBF is well suited for large throughput laboratories, and requires a relatively short period of fixation, but can also be used for the long-term storage of tissue. Formalin fixation is thought to form between the aldehydes and the proteins, creating a gel, thus retaining cellular constituents in their in vivo relationship.

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JB-4 is a water-soluble, GMA based, plastic resin kit intended for use in the preparation of embedded samples for high resolution light microscopy. It is a technique now widely used for research and clinical diagnosis. JB-4 yields semi-thin sections (0.5μ-2μ) with excellent morphological preservation.

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Orange II sodium salt,(Certified by the Biological Stain Commission), Dye content ≥85 % (4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt; Acid Orange 7; Acid Orange A; Orange II; Tropaeolin 000 No. 2).

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Evans blue has been used to check cell viability. It has been used to study BBB permeability.